ptc's original spec for this ticket was: "Write a SKIP block which will test the one OS-specific branch in init::defaults."
What I have done is to isolate the OS-specific code into an internal subroutine, _64_bit_adjustments(), and then set up mock values with which to test that subroutine in newly added test files t/configure/102-init_defaults-03.t and -04.t. So no SKIP block is needed. We can handle the larger concerns of building 32 on 64 in other tickets. Since we've achieved the original objective and test coverage is complete, I'm closing this ticket. kid51